Zylus sits next to 4 phonetic neighbors — Silas, Cyrus, and Zander are the closest matches by sound. Most share Zylus's Latin (via modern invention)-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of the forest, wood dweller (via Silas)"
"river in Peru"
"hare land"
"Yahweh has given"
"son of Jack"
"Yahweh is kin"
"powerful leader"
"son of the third, third-born's son"
"born from the ocean, son of the sea"
"modern invented variant of Taylor"
"servant of Marduk"
"sea, ocean"
"settlement on a Roman road, farm on the paved way"
"modern American name, strong and leading"
"spirit, companion"
"defender of men"
"sea of bitterness, drop of the sea"
"eternal"
"rocky stream"
"first, beginning"
Similar sound: These names share phonetic patterns with Zylus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin (via modern invention) origins, giving them the same cultural heritage as Zylus.
Rhythm: Zylus is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.